EP 1083555 A1 20010314 - Use of an optical information recording medium
Title (en)
Use of an optical information recording medium
Title (de)
Verwendung von einem optischen Informationsaufzeichnungsmedium
Title (fr)
Utilisation d'un milieu d'enregistrement optique d'information
Publication
Application
Priority
JP 25467299 A 19990908
Abstract (en)
An optical information recording medium composed of a substrate and a recording layer having a dye compound of the formula (I): R<1>R<2>C=L<1>-L<2>=L<3>-NR<3>R<4> in which each of R<1> and R<2> is an electron-attracting group (i.e., electron-withdrawing group) having a Hammett's substituent constant sigma p in the range of 0.2 to 0.9; each of L<1>, L<2>, and L<3> is a methine group which can have a substituent under such condition that two or three of L<1>, L<2>, and L<3> can form a ring structure together with the substituent; and each of R<3> and R<4> is a hydrogen atom, an alkyl group, an aryl group, an aralkyl group, or a heterocyclic group, provided that each set of R<1> and R<2>, R<2> and a substituent of L<1>, R<2> and a substituent of L<2>, R<2> and a substituent of L<3>, a substituent of L<1> and R<3>, a substituent of L<2> and R<3>, a substituent of L<3> and R<3>, and R<3> and R<4> can be connected to each other to form a ring structure, is advantageously employed for recording information utilizing a laser beam having a wavelength of 550 nm or shorter.
IPC 1-7
IPC 8 full level
G11B 7/244 (2006.01); G11B 7/246 (2013.01); G11B 7/247 (2006.01); G11B 7/253 (2006.01); G11B 7/2534 (2013.01); G11B 7/254 (2006.01); G11B 7/2542 (2013.01); G11B 7/258 (2006.01); G11B 7/259 (2013.01)
CPC (source: EP US)
G11B 7/246 (2013.01 - EP US); G11B 7/2534 (2013.01 - EP US); G11B 7/2542 (2013.01 - EP US); G11B 7/259 (2013.01 - EP US); Y10T 428/21 (2015.01 - EP US)
Citation (search report)
- [X] US 5508143 A 19960416 - TANIGUCHI HITOSHI [JP], et al
- [X] ABDEL-HALIM S T: "SOLVATOCHROMISM OF A TYPICAL MEROCYANINE DYE", JOURNAL OF THE CHEMICAL SOCIETY. FARADAY TRANSACTIONS,GB,ROYAL SOCIETY OF CHEMISTRY, CAMBRIDGE, vol. 89, no. 1, 7 January 1993 (1993-01-07), pages 55 - 57, XP000335295, ISSN: 0956-5000
- [DA] DATABASE WPI Section Ch Week 199919, Derwent World Patents Index; Class G06, AN 1999-220052, XP002154914
Designated contracting state (EPC)
DE
DOCDB simple family (publication)
EP 1083555 A1 20010314; EP 1083555 B1 20050126; DE 60017653 D1 20050303; DE 60017653 T2 20050616; TW 561115 B 20031111; US 6379768 B1 20020430
DOCDB simple family (application)
EP 00119652 A 20000908; DE 60017653 T 20000908; TW 89118333 A 20000907; US 65797700 A 20000908